Your entire argument hinges around what Hamas "would" do, or what you think they'd do, if they could, while conveniently ignoring that Hamas obviously can't do these things, and that Gazan women, children and the vast majority of men are not part of Hamas.
While ignoring or attempting to justify what Israel actually is doing right now, and ignoring that no small number of them, including many in positions of significant power, clearly desire to do to Palestinians exactly what the Nazis attempted to do to Jews in Europe. Hamas, on the other hand, has stated that it would accept a two-state solution based in the pre-1967 borders between Israeli and Palestinian territory, with East Jerusalem as the Palestinian capital.
So the Hamas leadership, at any rate, is less extreme than Israeli far right.